Last Updated: August 27, 2021

Magnite respects the data protection and privacy rights you may have under applicable privacy laws (often referred to as “data subject rights” or “consumer privacy rights”).

As explained in our privacy policy, we do not process information that enables us to directly identify you as an individual. Instead, we collect certain digital identifiers that enable us to recognize your device or your Internet browser (each, a “Digital Identifier”).

For that reason, in order for us to honor any data protection and privacy requests that you submit to us, we need you to provide us with your Digital Identifiers and certain other information.  This is necessary to locate any records we hold about your device or browser. We explain below how to do this, and we use this additional information only for the purpose of processing your data protection and privacy requests.


Individuals in some jurisdictions (for example the European Economic Area (“EEA”), the United Kingdom (“UK”), Switzerland, and California), have certain rights available to them under the laws of those jurisdictions.

These rights may include the right to request access to, rectify, or request erasure/deletion or portability of, personal information. Individuals in these jurisdictions may also have a right to object to, or request that we restrict, processing of their personal information. Where such rights apply, we will comply with requests to exercise these rights in accordance with applicable data protection laws. We will also make efforts to honor such requests even in jurisdictions that do not provide for these rights.

If you make a request to access the specific pieces of personal information we hold about you in accordance with applicable law (also known as a “data subject access request“), we will provide you with information that we may have stored and associated with your Digital Identifiers.

Please note, however, that we have a very short retention period for the data we associate with Digital Identifiers. As a result, we may not be able to provide you with any records in response to a data subject access request because we have already deleted any data we may have held. In such cases, however, we will inform you that we have not been able to locate any records associated with your Digital Identifiers.

Important Note: We have a responsibility to verify your identity before we respond to a data subject access request. This is to make sure that we provide a copy of your personal information only to the person who is entitled to it – the person to whom the data relates. If you wish to make a data subject access request, we kindly ask that you contact us directly, with sufficient details for us to verify your identity (as explained below).


If you wish to exercise a data subject rights request, please follow the steps described below:

Step 1: Locate Your Digital Identifiers

In order for us to locate relevant records, we will need you to provide us with the Digital Identifiers of the devices you own and control. You can find your Digital Identifiers as follows:

Web Browsing As described in our privacy policy, our advertising technology operates by using text files called “cookies” that are placed on your device. Some of these cookies include a Digital Identifier. To locate these Digital Identifiers, you can search through your cookies for the cookies named “khaos” and “ruid” (which are set from the domain) “tvid” (which is set from the domain)  “fsk_retargeting” (which is set from the domain) and “knsso” (which is set from the domain). The text in each of these cookies is a separate Digital Identifier.

Please keep in mind that different cookies are placed on each browser that you use to access the Internet. As a result, if you use multiple browsers (for example, Google Chrome and Mozilla Firefox), you will need to locate the “khaos”, “ruid”, tvid,  “fsk retargeting” and “knsso” cookies for each browser.

Mobile Devices and other Internet Connected Devices
Additionally, certain mobile devices (for example, mobile phones or tablets using the iOS or Android operating systems) generate a persistent “Advertising Identifier” per device, which, among other things, can be used by third parties, like Magnite, for purposes of providing you with targeted advertising.

On iOS devices, your Advertising Identifier may be referred to as an “IDFA,” or “ID for Advertising.” On Android devices, your Advertising Identifier may be referred to as an “Advertising ID.” Please follow instructions from your mobile device manufacturer on how to locate your specific Advertising Identifier.

Step 2: Verify Your Digital Identifiers

In order to make sure that we are responding to the correct person, we also will need some supporting proof to demonstrate that the devices that have the Digital Identifiers you located in Step 1 are yours and that the information you are requesting relates to you.  For Digital Identifiers stored in cookies, please take a screenshot of each cookie, taking care to make sure that the screenshot shows both the name of the cookie and the full Digital Identifier. For Digital Identifiers located on a mobile device, please take a screenshot of a screen that displays the Digital Identifier.

We may also request that you respond to a few questions, so that we can appropriately verify your identity. Doing this helps us to validate that you have access to the device on which the Digital Identifiers have been placed (and that you are not an unauthorized third party attempting to “guess” Digital Identifiers).

Step 3: Submit to Magnite

Once you have located your Digital Identifiers and can provide us with verification of those Digital Identifiers, please contact us with details of the rights you wish to exercise. The easiest way to do so would be submit the relevant information into our END USER REQUEST PORTAL. We will request the following information:

Your full name
Your region
The data subject rights you wish to exercise
A full list of your Digital Identifiers
Device validation information, as set forth in Step 2
Identity certification

You can also make a data subject rights request by phone by calling Magnite’s data subject hotline at +1.888.812.3839 or emailing

If you are based in the EU you can contact our EU Representative:  
Lionheart Squared (Europe) Ltd (FAO – Magnite),
2 Pembroke House, Upper Pembroke Street 28-32, 
Dublin, DO2 EK84, Republic of Ireland.